Question

我正在尝试覆盖C＃中的Equals方法，我得到的错误就像

SoftCherry.Customer'是'类型'，但用作'变量'

错误行：返回this.FirstName ==（（客户）.obj）.FirstName＆amp;＆amp; this.LastName ==（（Customer）.obj）.LastName; 在客户类

这是我的代码

using System;

    namespace SoftCherry
    {
        public class MainClass
        {
            public static void Main()
            {
                Customer  C1  = new Customer ();
                C1.FirstName = "Raja";
                C1.LastName = "Thananki";

                Customer  C2= new Customer ();
                C2.FirstName = "Raja";
                C2.LastName = "Thananki";

                Console.WriteLine(C1== C2);
                Console.WriteLine(C1.Equals(C2));
                Console.ReadLine();
            }
        }

        public class Customer 
        {
            public string FirstName { get; set; }
            public string LastName { get; set; }

            public override bool Equals(object obj)
            {
                if (obj == null)
                {
                    return false;
                }
                if (!(obj is Customer))
                {
                    return false;
                }
                return this.FirstName == ((Customer).obj).FirstName &&
                    this.LastName == ((Customer).obj).LastName;
            }

            public override int GetHashCode()
            {
                return this.FirstName.GetHashCode() ^ this.LastName.GetHashCode();
            }
        }
    }

Answer 1

删除类型后的点：

return this.FirstName == ((Customer)obj).FirstName &&
       this.LastName == ((Customer)obj).LastName;

否则它是无效的语法。

Answer 2

您的代码应该使用(Customer)obj，而不是(Customer).obj。在你执行此演员表的任何地方都有一个错误的点。

覆盖C＃中的Equals方法

2 个答案: